Antenna orientation of 2 DWM1001 on same pcb


I am using 2 DWM1001 boards on same pcb. One Antenna pointing upward other pointing downward. One is dwm1001 running TWR initiator code other running with Responder code. Similarly I have other pcb board with same configuration. The moment turn on all the radios reading stops.

I have programmed each pair of init and responder with different signatures. By default it was 0xca,0xde. I changed them.

If I use only responder on one board Init on other board works perfectly. (The init/responder on each board is turned off)

Any idea what’s going wrong.

I measured power, it’s good . I am using 5V 1A SMPS for each board.